The post was written by Vanessa Haight Smith, book conservator and head of Preservation Services. On August 19th, I participated in the fifth annual “Hidden Treasures” event at the SI affiliate, the Heinz History Center in Pittsburgh. Visitors to the popular event are encouraged to bring their prized possessions to the History Center and meet with professional appraisers as the local CBS affiliate, KDKA-TV, cameras roam the museum.